Citation: XIAO Mi, YANG Zhao, ZHONG Xiao-Rong, XI Fang-Fang. Influence of Bi₂O₃ on the Structure and Dielectric Properties of Ag(Nb_0.8Ta_0.2)O₃ Ceramics[J]. Chinese Journal of Inorganic Chemistry, ;2014, 30(3): 649-653. doi: 10.11862/CJIC.2014.054 shu

Influence of Bi₂O₃ on the Structure and Dielectric Properties of Ag(Nb_0.8Ta_0.2)O₃ Ceramics

1.
School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China

Received Date: 3 July 2013
Available Online: 26 September 2013

The effect of Bi₂O₃ doping on the structure and dielectric properties of Ag(Nb_0.8Ta_0.2)O₃ ceramics was investigated in this paper. The results of X-ray diffraction (XRD) showed that the doping of Bi₂O₃ could tend to accelerate the reduction of Ag, which may originate from the substitution of Bi³⁺ for Ag⁺. A certain doping amount of Bi₂O₃ would result in the increase of dielectric constant, and the decrease of dielectric loss of Ag(Nb_0.8Ta_0.2)O₃ ceramics at room temperature, and making temperature coefficient shift for negative direction. The reason for the improvement of dielectric properties was also discussed. When the amount of Bi₂O₃ was about 3.5wt%, the sample had the best dielectric properties, larger permittivity (ε=672) and smaller dielectric loss (tanδ=7.3×10^-4).
- ANT;Bi₂O₃;doping;Ag precipitation;high dielectric constant
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沈阳化工大学材料科学与工程学院沈阳 110142

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Influence of Bi₂O₃ on the Structure and Dielectric Properties of Ag(Nb_0.8Ta_0.2)O₃ Ceramics